Moving a standard WordPress installation to a different host is a minor pain – I only do this occasionally, so every time I need to consider the configuration of the original environment and how this translates to the new server. Nothing too challenging, but tedious and prone to error. So I figured Docker containers areContinue reading Docker WordPress in a subdirectory

Admittedly, it had been unused for quite a long time but, regardless, my LinkedIn profile had a few historical recommendations from people I actually knew and respected, so I hesitated briefly before closing it. The main reason I had for closing my LinkedIn account is to protest in some small way against the lawsuit thatContinue reading I Closed my LinkedIn Account

We have a Braun Thermoscan infra-red (IR) thermometer that has been working perfectly for about five years. It started complaining about low batteries and shutting off, despite me replacing with new batteries that I checked had plenty of charge. When I opened it, I discovered that the batteries connect to the circuit board via simpleContinue reading Braun ThermoScan Fix – Low Battery Warning Switch Off

Here’s the sketch, it just reads and dumps to the console, the bridge can be used to send the data to the GNU/Linux side of the Yun. See the other post on doing this with a Raspberry Pi for some code to turn the data into something useful. I’m using the MCU of the YunContinue reading Arduino Yun Reading WH1080 using AUREL RX-4MM5

This article is a work in progress to create a power-controller for the Raspberry Pi based on a PIC microcontroller and MOSFET. The PIC implements an I2C slave to allow power control, and also to approximate the registers of a PCF8563 Real Time Clock (RTC) chip, to allow timed wake-up of the Pi. Power theContinue reading Raspberry Pi Power Controller

Having been unable to resist buying some old Hornby OO Gauge bits from the second hand cabinet in a model shop, justification came from the educational value it would offer my son if I could make a speed controller, perhaps adding a sensor or two – the essence of industrial control and feedback mechanisms. BeingContinue reading PIC/MOSFET PWM Model Train Controller

The gpfsel_list (I maybe should have called it lsgpio) utility displays a list of the currently configured function selections across all available GPIO pins and, for pins configured as GPIO, the current state of the pins. For pins configured with ALTn functions, the selected function is listed according to the datasheet information. It also showsContinue reading Raspberry Pi GPFSEL, GPIO, and PADS Status Viewer

There’s something exciting about crossing the boundary between the abstract world of software and the physical ‘real world’, and a relay driven from a GPIO pin seemed like a good example of this. Although a simple project, I still learned some new things about the Raspberry Pi while doing it. There are only four componentsContinue reading Raspberry Pi – Driving a Relay using GPIO